Need help with minecraft launcher

I get this message every time I try to launch Minecraft 1.8.7. I was using the mods Optifine and Mineshafter, but I disabled them, and the same thing still happens. Given that this is a problem with vanilla Minecraft, how can I fix this?

minecraft-java-edition

Best Answer

Check if your Java is up to date. You can verify your java here -> https://www.java.com/en/download/installed.jsp

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How do you get the Minecraft launcher to work?

Try these fixes:

End your Minecraft process.

End incompatible software.

Run Minecraft as administrator.

Use the Compatibility mode.

Remove Mods.

Update your video card driver.

Reinstall the Minecraft.

How do I fix Minecraft Launcher not working?

My Launcher fails to startup, and I get a system error 'This app can't open. '

Go to the start menu.
RIGHT click on the Minecraft Launcher.
Click \u201cMore.\u201d
Open \u201cApp Settings.\u201d
Within app settings, click on \u201cRepair\u201d and \u201cReset.\u201d

OFFICIAL Minecraft Launcher What It DOES And DOESNT Have

More answers regarding need help with minecraft launcher

Answer 2

Your problem is right here:

java.lang.ClassNotFoundException: net.minecraft.client.main.Main

Knowing this, your best option would be to create a new profile and start from scratch. When you modded the other profile, something somewhere got corrupted.

To delete an old profile and make a new one:

Navigate to the Profile Editor tab.
Right-click the profile that is giving you issues.
Hit Delete Profile and confirm the action.
Right-click on the blank space and select Add Profile.
Usually you don't need to choose any settings, but make sure that "Use Version" is set to "Use Latest Version"
Launch this new profile.

Now, this will break mods because you're not running on a modded profile. To reinstall your mods, carefully follow the instructions from your original mod poster. Personally, I would recommend that you install Minecraft 1.8 (Use Version should be set to Minecraft 1.8) and then install Forge. Install all the required mods.

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